Chemistry

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9 September, 10:16

Calcium carbonate was placed in a flask on a balance, and dilute hydrochloric acid was added. Carbon

dioxide gas was produced and escaped from the flask. The total mass of the flask and its contents was

recorded every 10 seconds. The diagram above shows a plot of the results. Between which of the following

times was the reaction the fastest?

a.

b.

Between 0 and 10 seconds

Between 10 and 20 seconds

c. Between 20 and 30 seconds

d. Between 30 and 40 seconds